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5.1.1. Single-phase motor: Non-reversible
5.1.2. Three-phase motor: Not offered.
6. Operation
6.1. Before starting, pump must be primed (free of air and
suction pipe full of liquid) and discharge valve partially
open. Plugs are provided in the casing and valve so
pump/suction piping can be filled and/or vented/
drained in any pump orientation.
6.2. Make complete check after unit is run under operating
conditions and temperature has stabilized. Check for
expansion of piping.
7. Maintenance
7.1. Ball bearings are located in and are part of the motor.
They are permanently lubricated. No greasing required.
CAUTION
Pumped liquid provides lubrication. If pump is run dry,
rotating parts will seize and mechanical seal will be
damaged. Do not operate at or near zero flow. Energy
imparted to the liquid is converted into heat. Liquid may
flash to vapor. Rotating parts require liquid to prevent
scoring or seizing.
8. Disassembly
Complete disassembly of the unit will be described.
Proceed only as far as required to perform the maintenance
work required.
8.1. Turn off power.
8.2. Drain system and flush if necessary.
8.3. Disassembly of Liquid-End:
8.3.1. Remove casing bolts.
8.3.2. Remove motor and remaining Liquid-End
assembly from casing (still connected to piping)
and position vertically for easier disassembly.
8.3.3. Remove impeller bolt and washer.
CAUTION
Do not insert screwdriver between impeller vanes to
prevent rotation of close-coupled units. Remove cap at
opposite end of motor. A screwdriver slot or a pair of flats
will be exposed. Using them will prevent impeller damage.
8.3.4. Remove impeller by pulling axially.
8.3.5. Remove separator plate.
8.3.6. Remove shaft sleeve.
8.3.7. Remove intermediate stage.
8.3.8. Repeat steps 8.3.4 through 8.3.7 for three stage
pumps.
8.3.9. Remove last impeller.
8.3.10. Remove last separator plate.
8.3.11. Remove seal retainer.
8.3.12. Remove shaft extension using a screwdriver in
the slot or flats in the back of the motor to
prevent rotation and a wrench to turn
extension.
8.3.13. Pry off the rotating element of the mechanical
seal from the motor shaft by using two (2)
regular screw drivers 180º apart and using
the motor adapter inner boss as a fulcrum
point and then prying seal up.
8.3.14. Remove the motor adapter bolts,
washers and o-rings.
8.3.15. Remove the motor adapter.
8.3.16. Remove the stationary element of the
mechanical seal by pushing it out from the
motor side with a blunt instrument.
9. Reassembly
9.1. All parts should be cleaned before assembly.
9.2. Refer to parts list to identify required replacement
items. Specify pump index or catalog number when
ordering parts.
9.3. Reassembly is the reverse of disassembly.
9.4. Observe the following when reassembling the liquid-end:
9.4.1. All mechanical seal components must be in
good condition or leakage may result.
Replacement of complete seal assembly,
whenever seal has been removed, is good
standard practice. It is permissible to use a light
lubricant, such as glycerin, to facilitate
assembly. Do not contaminate the mechanical
seal faces with lubricant.
9.4.2. Inspect the o-rings and replace if
damaged. The o-rings may be lubricated with
petroleum jelly to ease assembly.
9.4.3. Inspect impellers for wear, degradation
or blockage. Clean or replace as necessary.
9.4.4. Inspect iron parts for excessive corrosion or
degradation. Replace as necessary.
9.4.5. Inspect stainless steel components for excessive
wear or degradation and replace as necessary.
9.4.6. Wear rings contained in the interstage(s) and
casing would need to be pressed or pried out
and pressed in should they need replacement.
9.5. Check reassembled unit for binding and correct as
necessary.
9.6. Be sure to tighten casing bolts in a criss-cross manner
to prevent o-ring binding and cracking of the casing
ears. Secure to 35 ft-lbs.
10. Trouble Shooting Chart
MOTOR NOT RUNNING (See causes 1 through 6)
LITTLE OR NO LIQUID DELIVERED
(See causes 7 through 16)
POWER CONSUMPTION TOO HIGH
(See causes 4, 16, 17, 18, 21)
EXCESSIVE NOISE AND VIBRATION
(See causes 4, 6, 9, 12, 14, 15, 17, 19, 20, 21)
PROBABLE CAUSE:
1. Tripped thermal protector
2. Open circuit breaker
3. Blown fuse
4. Rotating parts binding
5. Motor wired improperly
6. Defective motor
7. Not primed
8. Discharge plugged or valve closed
9. Incorrect rotation
10. Foot valve too small, suction not submerged,
inlet screen plugged.
11. Low voltage
12. Air or gasses in liquid
13. System head too high
14. NPSHA too low: Suction lift too high or suction
losses excessive. Check with vacuum gauge.
15. Impeller worn or plugged
16. Incorrect impeller diameter
17. Head too low, causing excessive flow rate
18. Viscosity or specific gravity too high
19. Worn bearings
20. Pump or piping loose
21. Pump and motor misaligned
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